The first simple experiment that we will run is to verify the IP connectivity between our hosts.

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a. Check the interfaces of your nodes. In the terminal type:

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{{{

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sudo ifconfig

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}}}

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You should see at least three interfaces:

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* A single '''control interface'''. This is the interface you use to access the node, e.g. ssh into your host. The control interface is mainly used for control traffic, i.e. traffic for controlling the node and the experiment.

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* The '''data interfaces'''. These are the interfaces that are used for sending experimental traffic. These interfaces connect to the other hosts of your experiment through GENI. The links between these interfaces are the ones that allow you to run non-IP experiments. '''The data interfaces are the ones that have an IP address and mask that match what you configured before you reserved your resources.'''

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b. Fill in the worksheet, noting the name and IP address of the control and of the data interfaces for each node.

The first simple experiment that we will run is to verify the IP connectivity between our hosts.

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a. Check the interfaces of your nodes. In the terminal type:

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{{{

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sudo ifconfig

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}}}

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You should see at least three interfaces:

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* A single '''control interface'''. This is the interface you use to access the node, e.g. ssh into your host. The control interface is mainly used for control traffic, i.e. traffic for controlling the node and the experiment.

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* The '''data interfaces'''. These are the interfaces that are used for sending experimental traffic. These interfaces connect to the other hosts of your experiment through GENI. The links between these interfaces are the ones that allow you to run non-IP experiments. '''The data interfaces are the ones that have an IP address and mask that match what you configured before you reserved your resources.'''

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b. Fill in the worksheet, noting the name and IP address of the control and of the data interfaces for each node.